/* 国产视频汽车改装视频社区 - 原创样式 | qhyoui.cn */
/* 配色：赛车红 #E84530 / 深夜蓝黑 #1A1A2E / 金属金 #F5A623 */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:#0D0D1A;color:#F0F0F5;line-height:1.7;overflow-x:hidden}
a{color:#F5A623;text-decoration:none;transition:color .25s}
a:hover{color:#E84530}
img{max-width:100%;height:auto;display:block}
h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700}
em{font-style:normal;color:#E84530}

/* Container */
.kkt-container{max-width:1200px;margin:0 auto;padding:0 20px}

/* Header */
.kkt-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(13,13,26,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(232,69,48,.15);padding:0 0;transition:background .3s}
.kkt-header .kkt-container{display:flex;align-items:center;height:64px;gap:16px}
.kkt-brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.kkt-brand img{width:40px;height:40px;border-radius:8px}
.kkt-brand-name{font-size:1.25rem;font-weight:800;color:#F0F0F5;letter-spacing:1px}
.kkt-brand-name em{color:#E84530}
.kkt-nav{display:flex;gap:6px;margin-left:auto}
.kkt-nav a{padding:8px 14px;border-radius:6px;font-size:.9rem;color:#8A8AA3;font-weight:500;transition:all .25s}
.kkt-nav a:hover,.kkt-nav a.active{color:#F0F0F5;background:rgba(232,69,48,.12)}
.kkt-search-box{display:flex;align-items:center;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.08);border-radius:8px;overflow:hidden;margin-left:12px;flex-shrink:0}
.kkt-search-box input{background:transparent;border:none;color:#F0F0F5;padding:7px 12px;font-size:.85rem;width:180px;outline:none}
.kkt-search-box input::placeholder{color:#5A5A73}
.kkt-search-btn{background:#E84530;color:#fff;border:none;padding:7px 14px;font-size:.85rem;cursor:pointer;font-weight:600;transition:background .25s}
.kkt-search-btn:hover{background:#d13a28}
.kkt-menu-toggle{display:none;background:none;border:none;color:#F0F0F5;font-size:1.5rem;cursor:pointer;padding:8px}

/* Hero */
.kkt-hero{position:relative;min-height:92vh;display:flex;align-items:center;justify-content:center;text-align:center;margin-top:64px;overflow:hidden}
.kkt-hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;background-repeat:no-repeat;transform:scale(1.05);animation:kktHeroZoom 20s ease-in-out infinite alternate}
@keyframes kktHeroZoom{0%{transform:scale(1.05)}100%{transform:scale(1.15)}}
.kkt-hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(13,13,26,.88) 0%,rgba(232,69,48,.15) 50%,rgba(13,13,26,.92) 100%)}
.kkt-hero-content{position:relative;z-index:2;max-width:800px;padding:40px 20px}
.kkt-hero-tags{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:24px}
.kkt-hero-tags span{background:rgba(232,69,48,.18);color:#E84530;padding:4px 14px;border-radius:20px;font-size:.8rem;font-weight:600;border:1px solid rgba(232,69,48,.3)}
.kkt-hero h1{font-size:2.6rem;margin-bottom:20px;line-height:1.25}
.kkt-hero h1 em{color:#E84530;font-size:3rem}
.kkt-hero p{font-size:1.05rem;color:#8A8AA3;margin-bottom:32px;line-height:1.8}
.kkt-hero-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.kkt-btn-primary{background:linear-gradient(135deg,#E84530,#d13a28);color:#fff;padding:12px 32px;border-radius:8px;font-weight:700;font-size:1rem;transition:all .3s;box-shadow:0 4px 20px rgba(232,69,48,.35)}
.kkt-btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(232,69,48,.5);color:#fff}
.kkt-btn-outline{border:2px solid #F5A623;color:#F5A623;padding:10px 30px;border-radius:8px;font-weight:700;font-size:1rem;transition:all .3s}
.kkt-btn-outline:hover{background:#F5A623;color:#0D0D1A}
.kkt-btn-sm{padding:6px 16px;font-size:.82rem;border-radius:6px;font-weight:600;display:inline-block}

/* Stats */
.kkt-stats{background:linear-gradient(90deg,#1A1A2E,#16162A);padding:32px 0;border-top:1px solid rgba(245,166,35,.1);border-bottom:1px solid rgba(245,166,35,.1)}
.kkt-stats .kkt-container{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.kkt-stat-num{display:block;font-size:2rem;font-weight:800;color:#F5A623;letter-spacing:1px}
.kkt-stat-label{font-size:.9rem;color:#8A8AA3;margin-top:4px}

/* Section */
.kkt-section{padding:72px 0}
.kkt-section-alt{background:#16162A}
.kkt-section-title{font-size:1.8rem;text-align:center;margin-bottom:12px;color:#F0F0F5}
.kkt-section-title em{color:#E84530}
.kkt-section-desc{text-align:center;color:#8A8AA3;max-width:700px;margin:0 auto 40px;font-size:.95rem;line-height:1.7}

/* Video Grid */
.kkt-video-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.kkt-video-card{background:#16162A;border-radius:12px;overflow:hidden;border:1px solid rgba(255,255,255,.05);transition:all .35s}
.kkt-video-card:hover{transform:translateY(-6px);box-shadow:0 12px 40px rgba(232,69,48,.15);border-color:rgba(232,69,48,.2)}
.kkt-video-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.kkt-video-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.kkt-video-card:hover .kkt-video-thumb img{transform:scale(1.08)}
.kkt-video-play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.3);opacity:0;transition:opacity .3s}
.kkt-video-card:hover .kkt-video-play{opacity:1}
.kkt-play-icon{width:56px;height:56px;background:rgba(232,69,48,.9);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.4rem;color:#fff;padding-left:4px;box-shadow:0 4px 20px rgba(232,69,48,.5)}
.kkt-video-dur{position:absolute;bottom:8px;right:8px;background:rgba(0,0,0,.75);color:#fff;padding:2px 8px;border-radius:4px;font-size:.75rem;font-weight:600}
.kkt-video-tag{position:absolute;top:8px;left:8px;background:rgba(232,69,48,.85);color:#fff;padding:2px 10px;border-radius:4px;font-size:.72rem;font-weight:600}
.kkt-video-info{padding:16px}
.kkt-video-info h3{font-size:.95rem;margin-bottom:8px;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.kkt-video-meta{display:flex;align-items:center;gap:6px;font-size:.8rem;color:#5A5A73;margin-bottom:6px}
.kkt-sep{color:#3A3A53}
.kkt-video-stats{display:flex;gap:12px;font-size:.78rem;color:#8A8AA3}

/* Module Grid */
.kkt-module-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kkt-module-card{background:#16162A;border:1px solid rgba(255,255,255,.05);border-radius:12px;padding:28px 20px;text-align:center;transition:all .35s}
.kkt-section-alt .kkt-module-card{background:#0D0D1A}
.kkt-module-card:hover{border-color:rgba(232,69,48,.25);transform:translateY(-4px);box-shadow:0 8px 30px rgba(232,69,48,.1)}
.kkt-module-icon{font-size:2.4rem;margin-bottom:14px}
.kkt-module-card h3{font-size:1.05rem;margin-bottom:10px;color:#F0F0F5}
.kkt-module-card p{font-size:.85rem;color:#8A8AA3;line-height:1.6}
.kkt-module-count{display:inline-block;margin-top:12px;font-size:.78rem;color:#F5A623;font-weight:600}

/* Community Grid */
.kkt-community-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.kkt-community-card{background:#16162A;border:1px solid rgba(255,255,255,.05);border-radius:12px;padding:28px 20px;transition:all .35s}
.kkt-section-alt .kkt-community-card{background:#0D0D1A}
.kkt-community-card:hover{border-color:rgba(245,166,35,.25);transform:translateY(-4px)}
.kkt-community-icon{font-size:2rem;margin-bottom:12px}
.kkt-community-card h3{font-size:1rem;margin-bottom:8px;color:#F0F0F5}
.kkt-community-card p{font-size:.85rem;color:#8A8AA3;line-height:1.6}
.kkt-community-members{display:inline-block;margin-top:10px;font-size:.78rem;color:#E84530;font-weight:600}

/* Expert Grid */
.kkt-expert-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.kkt-expert-card{background:#16162A;border:1px solid rgba(255,255,255,.05);border-radius:12px;padding:28px;text-align:center;transition:all .35s}
.kkt-expert-card:hover{border-color:rgba(232,69,48,.25);transform:translateY(-4px)}
.kkt-expert-avatar{width:100px;height:100px;border-radius:50%;object-fit:cover;margin:0 auto 16px;border:3px solid rgba(232,69,48,.3)}
.kkt-expert-card h3{font-size:1.1rem;margin-bottom:6px}
.kkt-expert-role{display:block;font-size:.82rem;color:#F5A623;margin-bottom:10px}
.kkt-expert-desc{font-size:.85rem;color:#8A8AA3;line-height:1.6;margin-bottom:12px}
.kkt-expert-tags{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;margin-bottom:16px}
.kkt-expert-tags span{background:rgba(245,166,35,.1);color:#F5A623;padding:2px 10px;border-radius:12px;font-size:.72rem}
.kkt-expert-btns{display:flex;gap:8px;justify-content:center}

/* Partner Wall */
.kkt-partner-wall{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}
.kkt-partner-item{background:#0D0D1A;border:1px solid rgba(255,255,255,.08);border-radius:8px;padding:16px 28px;font-size:1.1rem;font-weight:700;color:#8A8AA3;letter-spacing:2px;transition:all .3s}
.kkt-partner-item:hover{border-color:#F5A623;color:#F5A623;transform:scale(1.05)}

/* HowTo Steps */
.kkt-howto-steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.kkt-howto-step{background:#16162A;border:1px solid rgba(255,255,255,.05);border-radius:12px;padding:28px 20px;text-align:center;position:relative;transition:all .35s}
.kkt-howto-step:hover{border-color:rgba(232,69,48,.25);transform:translateY(-4px)}
.kkt-howto-num{display:block;font-size:2.5rem;font-weight:900;color:rgba(232,69,48,.2);margin-bottom:12px}
.kkt-howto-step h3{font-size:1rem;margin-bottom:8px;color:#F0F0F5}
.kkt-howto-step p{font-size:.85rem;color:#8A8AA3;line-height:1.6}

/* FAQ */
.kkt-faq-list{max-width:800px;margin:0 auto}
.kkt-faq-item{border:1px solid rgba(255,255,255,.06);border-radius:10px;margin-bottom:12px;overflow:hidden;background:#0D0D1A}
.kkt-section-alt .kkt-faq-item{background:#16162A}
.kkt-faq-q{padding:18px 20px;font-weight:700;font-size:.95rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:color .25s}
.kkt-faq-q::after{content:"+";font-size:1.3rem;color:#E84530;transition:transform .3s}
.kkt-faq-item.open .kkt-faq-q::after{transform:rotate(45deg)}
.kkt-faq-q:hover{color:#E84530}
.kkt-faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease,padding .4s ease}
.kkt-faq-item.open .kkt-faq-a{max-height:300px;padding:0 20px 18px}
.kkt-faq-a span{font-size:.88rem;color:#8A8AA3;line-height:1.7;display:block}

/* Review Grid */
.kkt-review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.kkt-review-card{background:#16162A;border:1px solid rgba(255,255,255,.05);border-radius:12px;padding:24px;transition:all .35s}
.kkt-review-card:hover{border-color:rgba(245,166,35,.2);transform:translateY(-3px)}
.kkt-review-stars{color:#F5A623;font-size:1.1rem;margin-bottom:12px;letter-spacing:2px}
.kkt-review-text{font-size:.88rem;color:#C0C0D0;line-height:1.7;margin-bottom:14px}
.kkt-review-author{font-size:.82rem;color:#F5A623;font-weight:600}
.kkt-review-date{font-size:.75rem;color:#5A5A73;margin-top:4px}

/* Contact Grid */
.kkt-contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.kkt-contact-card{background:#0D0D1A;border:1px solid rgba(255,255,255,.06);border-radius:12px;padding:28px}
.kkt-section-alt .kkt-contact-card{background:#16162A}
.kkt-contact-card h3{font-size:1.1rem;color:#F5A623;margin-bottom:14px}
.kkt-contact-card p{font-size:.88rem;color:#8A8AA3;line-height:1.8}

/* CTA */
.kkt-cta{background:linear-gradient(135deg,#E84530,#d13a28);padding:60px 0;text-align:center}
.kkt-cta h2{font-size:1.8rem;color:#fff;margin-bottom:12px}
.kkt-cta p{color:rgba(255,255,255,.8);margin-bottom:28px;font-size:1rem}
.kkt-cta-btn{display:inline-block;background:#fff;color:#E84530;padding:14px 40px;border-radius:8px;font-weight:800;font-size:1.05rem;transition:all .3s;box-shadow:0 4px 20px rgba(0,0,0,.2)}
.kkt-cta-btn:hover{transform:translateY(-3px);box-shadow:0 8px 30px rgba(0,0,0,.3);color:#E84530}

/* Footer */
.kkt-footer{background:#0A0A16;padding:60px 0 0;border-top:1px solid rgba(232,69,48,.1)}
.kkt-footer-top{display:grid;grid-template-columns:1.2fr 2fr;gap:40px;margin-bottom:40px}
.kkt-footer-brand img{width:120px;margin-bottom:14px}
.kkt-footer-desc{font-size:.85rem;color:#5A5A73;line-height:1.7;margin-bottom:10px}
.kkt-footer-domain{font-size:.9rem;color:#E84530;font-weight:700}
.kkt-footer-cols{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.kkt-footer-col h4{font-size:.95rem;color:#F0F0F5;margin-bottom:14px;padding-bottom:8px;border-bottom:2px solid rgba(232,69,48,.2)}
.kkt-footer-col a{display:block;font-size:.82rem;color:#5A5A73;padding:4px 0;transition:color .25s}
.kkt-footer-col a:hover{color:#F5A623}
.kkt-footer-col p{font-size:.82rem;color:#5A5A73;line-height:1.7}
.kkt-footer-qr{display:flex;gap:16px;margin-top:12px}
.kkt-footer-qr div{text-align:center}
.kkt-footer-qr img{width:80px;height:80px;border-radius:6px;margin-bottom:4px}
.kkt-footer-qr span{font-size:.72rem;color:#5A5A73}
.kkt-footer-social{display:flex;align-items:center;gap:12px;justify-content:center;padding:20px 0;border-top:1px solid rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.04)}
.kkt-footer-social span{color:#5A5A73;font-size:.85rem}
.kkt-footer-social a{background:rgba(255,255,255,.05);padding:6px 16px;border-radius:6px;font-size:.82rem;color:#8A8AA3;transition:all .25s}
.kkt-footer-social a:hover{background:rgba(232,69,48,.15);color:#E84530}
.kkt-footer-bottom{text-align:center;padding:20px 0;font-size:.8rem;color:#3A3A53}
.kkt-footer-bottom p{margin:2px 0}

/* Page Banner (内页) */
.kkt-page-banner{padding:100px 0 50px;text-align:center;margin-top:64px;background:linear-gradient(135deg,#1A1A2E,#0D0D1A);border-bottom:1px solid rgba(232,69,48,.1)}
.kkt-page-banner h1{font-size:2rem;margin-bottom:10px}
.kkt-page-banner h1 em{color:#E84530}
.kkt-page-banner p{color:#8A8AA3;font-size:.95rem}
.kkt-breadcrumb{display:flex;gap:8px;justify-content:center;margin-top:16px;font-size:.82rem;color:#5A5A73}
.kkt-breadcrumb a{color:#8A8AA3}
.kkt-breadcrumb .sep{color:#3A3A53}

/* Content (内页) */
.kkt-content{padding:60px 0}
.kkt-content-text{max-width:800px;margin:0 auto}
.kkt-content-text h2{font-size:1.4rem;color:#F5A623;margin:32px 0 14px}
.kkt-content-text h3{font-size:1.15rem;color:#F0F0F5;margin:24px 0 10px}
.kkt-content-text p{font-size:.92rem;color:#8A8AA3;line-height:1.8;margin-bottom:16px}

/* Responsive */
@media(max-width:1024px){
  .kkt-video-grid,.kkt-expert-grid,.kkt-review-grid,.kkt-community-grid{grid-template-columns:repeat(2,1fr)}
  .kkt-module-grid,.kkt-howto-steps{grid-template-columns:repeat(2,1fr)}
  .kkt-footer-top{grid-template-columns:1fr}
  .kkt-footer-cols{grid-template-columns:repeat(2,1fr)}
  .kkt-contact-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .kkt-nav{display:none;position:fixed;top:64px;left:0;right:0;background:rgba(13,13,26,.98);flex-direction:column;padding:20px;gap:4px;border-bottom:1px solid rgba(232,69,48,.15)}
  .kkt-nav.open{display:flex}
  .kkt-menu-toggle{display:block}
  .kkt-search-box{display:none}
  .kkt-hero h1{font-size:1.6rem}
  .kkt-hero h1 em{font-size:2rem}
  .kkt-stats .kkt-container{grid-template-columns:repeat(2,1fr)}
  .kkt-video-grid,.kkt-expert-grid,.kkt-review-grid,.kkt-community-grid{grid-template-columns:1fr}
  .kkt-module-grid,.kkt-howto-steps{grid-template-columns:1fr}
  .kkt-section{padding:48px 0}
  .kkt-section-title{font-size:1.4rem}
  .kkt-footer-cols{grid-template-columns:1fr}
}